| |
km
|
Hockersmith et al.
[12]
|
Hockersmith et al.
[14]
|
Wargo-Rub et al.
[15]
|
Wargo-Rub et al.
[16]
|
|---|
|
Detection location
|
downstream
|
RT
|
PIT
|
P value
|
AT
|
PIT
|
P value
|
AT
|
PIT
|
P value
|
AT
|
PIT
|
P value
|
|---|
|
Yearling
| | | | | | | | | | | | | |
|
Little Goose Dam
|
60
|
0.62
|
0.598
|
0.307
|
1.00
|
0.89
|
0.004
|
0.93
|
0.93
|
0.893
|
0.92
|
0.95
|
0.107
|
|
Lower Monumental Dam
|
106
|
0.554
|
0.507
|
0.591
|
0.88
|
0.83
|
0.222
|
0.92
|
0.88
|
0.08
|
0.88
|
0.93
|
0.096
|
|
Ice Harbor Dam
|
157
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
0.81
|
0.84
|
0.285
|
0.80
|
0.83
|
0.336
|
|
McNary Dam
|
225
|
0.328
|
0.343
|
0.427
|
0.70
|
0.79
|
0.102
|
0.72
|
0.78
|
0.054
|
0.68
|
0.75
|
0.095
|
|
John Day Dam
|
348
|
NA
|
NA
|
NA
|
0.61
|
0.65
|
0.538
|
0.62
|
0.72
|
0.01
|
0.60
|
0.83a
|
0.001
|
|
Bonneville Dam
|
460
|
NA
|
NA
|
NA
|
0.48
|
0.54
|
0.547
|
0.50
|
0.63
|
0.001
|
0.52
|
0.75 a
|
0.021
|
|
Subyearling
| |
Wargo-Rub et al .
[15]
| | | | | | | | | |
| | |
AT
|
PIT
|
P
| | | | | | | | | |
|
Little Goose Dam
|
60
|
0.65
|
0.81
|
0.003
| | | | | | | | | |
|
McNary Dam
|
225
|
0.23
|
0.56
|
< 0.001
| | | | | | | | | |
- Fish were either surgically implanted with a sham radio transmitter (RT) containing an embedded PIT tag or an acoustic tag and a PIT tag (AT). All fish in these four studies were tagged at Lower Granite Dam (695 km upstream from the Pacific Ocean) and released in the Snake River just downstream of the dam. Fish were detected by PIT detectors at several downstream dams (distance downstream from release shown) on their seaward migration. The datasets from Hockersmith et al. [14] and Wargo-Rub et al. [15, 16] were used to assess length-specific tag effects.
-
aIn 2008 at these two locations, the PIT data collected did not conform to statistical model assumptions and these estimates are considered problematic or inaccurate [20].
-
AT acoustic transmitter, NA not applicable, RT radio transmitter, PIT passive integrated transponder.
